Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Erratum: Orbital Angular Momentum of Magnons in Collinear Magnets [Phys. Rev. Lett. 129, 167202 (2022)].

Physical review letters·2023
Same author

Orbital Angular Momentum of Magnons in Collinear Magnets.

Physical review letters·2022
Same author

Exact results for the orbital angular momentum of magnons on honeycomb lattices.

Journal of physics. Condensed matter : an Institute of Physics journal·2022
Same author

High-Field Magnetoelectric and Spin-Phonon Coupling in Multiferroic (NH<sub>4</sub>)<sub>2</sub>[FeCl<sub>5</sub>·(H<sub>2</sub>O)].

Inorganic chemistry·2022
Same author

Two methods to study inelastic neutron-scattering measurements based on<i>ω</i><sub></sub>(<b>q</b>) versus<i>S</i>(<b>q</b>,<i>ω</i>) applied to the magnetic open honeycomb lattice Tb<sub>2</sub>Ir<sub>3</sub>Ga<sub>9</sub>.

Journal of physics. Condensed matter : an Institute of Physics journal·2022
Same author

Cluster Frustration in the Breathing Pyrochlore Magnet LiGaCr_{4}S_{8}.

Physical review letters·2020

Related Experiment Video

Updated: May 30, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Spin waves in antiferromagnetically coupled bimetallic oxalates.

Peter L Reis1, Randy S Fishman

  • 1Physics Department, University of North Dakota, Grand Forks, ND 58202-7129, USA. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6065, USA.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 6, 2011
PubMed
Summary

Molecule-based magnets, bimetallic oxalates, exhibit spin-wave gaps influenced by crystal-field angular momentum. This research explores the spin-wave spectrum in these materials, finding gaps up to 15 meV.

More Related Videos

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
09:41

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

Related Experiment Videos

Last Updated: May 30, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
09:41

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Magnetism

Background:

  • Bimetallic oxalates are molecule-based magnets featuring transition-metal ions M(II) and M'(III) on a honeycomb lattice.
  • Understanding their magnetic properties is crucial for developing new magnetic materials.

Purpose of the Study:

  • To investigate the spin-wave spectrum of antiferromagnetically coupled bimetallic oxalates.
  • To determine the influence of crystal-field angular momentum on the spin-wave gap.

Main Methods:

  • Application of the Holstein-Primakoff expansion to derive the spin-wave spectrum.
  • Analysis of specific bimetallic oxalate systems: Fe(II)Mn(III), Ni(II)Mn(III), and V(II)V(III).

Main Results:

  • The spin-wave spectrum was calculated as a function of crystal-field angular momentum (L(2) and L(3)).
  • Calculated spin-wave gaps ranged from 0 meV (quenched angular momentum) to 15 meV.
  • Magnetic compensation was found to have no discernible effect on the spin-wave gap.

Conclusions:

  • Crystal-field angular momentum is a key factor determining the spin-wave gap in bimetallic oxalates.
  • The theoretical model accurately predicts spin-wave gaps in studied bimetallic oxalate systems.
  • These findings provide insights into the fundamental magnetic behavior of molecule-based magnets.